Experiencing happiness together facilitates dyadic coordination through the enhanced interpersonal neural...

Area of Science:

• Neuroscience
• Social Psychology
• Cognitive Science

Background:

• Shared positive emotions improve social interaction and understanding.
• The neural mechanisms linking shared emotions to social behavior are not fully understood.

Purpose of the Study:

• To investigate the neural basis of how shared positive emotions facilitate interpersonal cooperation.
• To examine the relationship between interpersonal neural synchronization (INS) and cooperative task performance.

Main Methods:

• Functional near-infrared spectroscopy (fNIRS)-based hyperscanning was used to record brain activity in dyads.
• Participants watched movie clips eliciting happiness or neutral emotions, followed by a cooperative task.
• Neural activation in the prefrontal cortex and interpersonal neural synchronization (INS) were measured.

Main Results:

• Higher INS in the left inferior frontal gyrus was observed when dyads watched happiness movies together compared to neutral movies.
• Dyads experiencing happiness together demonstrated more effective coordination during the cooperative task.
• Cooperation-related INS in the left middle frontal cortex was associated with improved coordination, and this mediated the emotion-INS-cooperation link.

Conclusions:

• Shared happiness enhances interpersonal cooperation through increased INS in specific prefrontal regions.
• INS during emotion sharing predicts subsequent cooperative behavior.
• INS serves as a neural marker for the facilitative effect of shared positive emotions on social coordination.